Window sash



FIG. 1 is a rear perspective view of a window sash of the present invention.

FIG. 2 is a rear elevation view of a window sash of the present invention shown in FIG. 1.

FIG. 3 is a side elevation view of a window sash of the present invention shown in FIG. 1; and,

FIG. 4 is a front elevation view of a window sash of the present invention shown in FIG. 1. 

The ornamental design for a window sash, as shown and described. 